蒸着テープにおける粒子間相互作用と磁気異方性

抄録

Interparticle interactions in metal evaporated tape were studied. Due to magnetic interaction fields in the media, two kinds of normalized remanence curves, DC De-magnetization remanence (DCD) and Isothermal Remanent Magnetization (IRM) curves, are not always consistent. In this paper, a new analysis method is considered. The difference between the remanence curves is interpreted as a magnetic interaction field, δH, which is defined as the difference between two kinds of remanence coercivities, H_r and H_a, which are obtained from the DCD and IRM curves, respectively. Parameter δH was confirmed to be useful for evaluating the interparticle interaction in the media. Also, the magnetic anisotropy energy derived from the interparticle interaction, which is estimated from the angular dependence of δH, is useful in discussing the thermal stability of the media’s recorded pattern.